A hydrogenation catalytic low-nitrogen biomass boiler

Abstract

The present invention discloses a hydrogenation catalytic low-nitrogen biomass boiler, which relates to the technical field of biomass boilers and includes a full-coverage large arc furnace arch. A combustion chamber is arranged inside the full-coverage large arc furnace arch, and a preheating zone is arranged inside the combustion chamber. An installation block is installed at the top of the preheating zone, and a connector is connected inside the installation block. A main combustion zone is arranged outside the preheating zone, and a hydrogenation zone is arranged at the top of the main combustion zone. In the present invention, there are a full-coverage large arc furnace arch, a preheating zone, a main combustion zone, a reburning zone and a hydrogenation zone. The use of the full-coverage large arc furnace arch can reduce the volumetric heat load of the furnace chamber. Then, through the preheating zone, the main combustion zone and the reburning zone, staged combustion and precise air distribution are realized, effectively controlling the generation of NO X , and the low-nitrogen combustion technology precisely treats the small amount of generated NO X , and finally achieves ultra-low emissions. It is an efficient, energy-saving and environmentally friendly heating device, breaking through the technical problems of ultra-low nitrogen emissions of biomass boilers and having great application prospects.

Description

Technical Field

[0001] The invention relates to the technical field of biomass boilers, and in particular to a hydrogenation catalytic low-nitrogen biomass boiler. Background Art

[0002] With the general trend of low carbon and low nitrogen environmental protection, biomass boilers are currently a zero-carbon emission (the CO2 absorbed by biomass during its growth is offset by the CO2 emitted by combustion) energy supply equipment, which does not occupy carbon indicators and is highly valued by the market. The NOX emissions in existing biomass boilers still need to be treated with denitrification equipment, most of which use SNCR and SCR denitrification technology. Although it can achieve certain results, the negative effects it brings cannot be completely solved, such as dust accumulation on the heating surface, corrosion, ammonia escape, operating costs and other issues. Summary of the invention

[0003] The purpose of the present invention is to solve the problem that NOX emissions in existing biomass boilers still need to be treated with denitrification equipment. Most of them use SNCR and SCR denitrification technologies. Although they can achieve certain effects, the negative effects they bring cannot be completely solved, such as dust accumulation on the heating surface, corrosion, ammonia escape, operating costs and other problems. A hydrogenation catalytic low-nitrogen biomass boiler is proposed.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] A hydrogenation catalytic low-nitrogen biomass boiler, comprising:

[0006] A fully covered large arc furnace arch, wherein a combustion chamber is arranged inside the fully covered large arc furnace arch, and a preheating zone is arranged inside the combustion chamber, a mounting block is installed on the top of the preheating zone, and a connecting head is connected inside the mounting block, a main combustion zone is arranged outside the preheating zone, and a hydrogenation zone is arranged on the top of the main combustion zone, a guide rail is installed inside the main combustion zone, and a linear motor is connected inside the guide rail, an injection head is installed at the bottom of the linear motor, and a hydrogen delivery pipe is connected outside the injection head, a second air pump is arranged inside the hydrogenation zone at the other end of the hydrogenation zone, and a second connecting pipe is connected to the top of the hydrogenation zone, and a hydrogen machine is connected to the other end of the second connecting pipe, a reburning zone is arranged on one side of the main combustion zone, and a nitrogen oxide detector is arranged outside the reburning zone, a slide groove is installed between the outside of the nitrogen oxide detector and the inside of the combustion chamber, and an electric push rod is installed inside the slide groove, a connecting plate is installed on the top of the electric push rod, and an atomizing nozzle is installed outside the connecting plate.

[0007] Preferably, the outside of the atomizing nozzle is connected to a first connecting pipe, and a reducing agent tank is installed at the other end of the first connecting pipe, the other end of the connecting head is connected to an air pipe, and the other end of the air pipe is connected to a first air pump, and a delivery pipe is connected between the other end of the first air pump and the combustion chamber.

[0008] Preferably, a lifting structure is formed between the atomizing nozzle and the combustion chamber through an electric push rod and a connecting plate, and the outer wall of the connecting plate is in contact with the inner wall of the slide groove.

[0009] Preferably, a moving structure is formed between the injection head and the main combustion zone through a linear motor and a guide rail, and the outer wall of the linear motor is in contact with the inner wall of the guide rail.

[0010] Preferably, a detachable structure is formed between the gas delivery pipe and the preheating zone through a connector and a mounting block, and the inner wall of the mounting block and the outer wall of the connector are in a threaded structure.

[0011] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0012] 1. In the present invention, a fully covered large arc furnace arch, a preheating zone, a main combustion zone, a reburning zone and a hydrogenation zone are provided. The use of a fully covered large arc furnace arch can reduce the volume heat load of the furnace, and then the preheating zone, the main combustion zone and the reburning zone are used to realize zoned combustion and precise air distribution, effectively controlling NO X Low-nitrogen combustion technology accurately handles the small amount of NOX generated, ultimately achieving ultra-low emissions. It is a highly efficient, energy-saving, and environmentally friendly heating equipment, which has broken through the technical difficulties of ultra-low nitrogen emissions from biomass boilers and has great application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the structure of the hydrogenation catalytic low-nitrogen biomass boiler in the present invention;

[0014] Figure 2 It is a schematic diagram of the internal structure of the combustion chamber in the present invention;

[0015] Figure 3 for Figure 2 Enlarged structural diagram at A in the middle.

[0016] Legend:

[0017] 1. Fully covered large arc furnace arch; 2. Combustion chamber; 3. Hydrogen generator; 4. Reductant tank; 5. First connecting pipe; 6. Second connecting pipe; 7. Delivery pipe; 8. First air pump; 9. Air delivery pipe; 10. Connector; 11. Mounting block; 12. Preheating zone; 13. Main combustion zone; 14. Hydrogenation zone; 15. Second air pump; 16. Nitrogen oxide detector; 17. Slide; 18. Connecting plate; 19. Electric push rod; 20. Atomizing nozzle; 21. Reburning zone; 22. Injection head; 23. Guide rail; 24. Linear motor; 25. Hydrogen delivery pipe. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] Reference Figure 1-3A hydrogenation catalytic low-nitrogen biomass boiler comprises a fully covered large arc furnace arch 1, a combustion chamber 2 is arranged inside the fully covered large arc furnace arch 1, and a preheating zone 12 is arranged inside the combustion chamber 2, a mounting block 11 is installed on the top of the preheating zone 12, and a connector 10 is connected to the inside of the mounting block 11, a main combustion zone 13 is arranged outside the preheating zone 12, and a hydrogenation zone 14 is arranged on the top of the main combustion zone 13, a guide rail 23 is installed inside the main combustion zone 13, and a linear motor 24 is connected to the inside of the guide rail 23, an injection head 22 is installed at the bottom of the linear motor 24, and a hydrogen delivery pipe 25 is connected to the outside of the injection head 22, a moving structure is formed between the injection head 22 and the main combustion zone 13 through the linear motor 24 and the guide rail 23, and the outer wall of the linear motor 24 is in contact with the inner wall of the guide rail 23, the second air pump 15 and the linear motor 24 are started, and the linear motor 24 drives the injection head 22 to move through the cooperation of the guide rail 23, so that it is convenient to move the high-concentration H2 is transported to different positions of the main combustion zone 13, the other end of the hydrogen delivery pipe 25 and the inside of the hydrogenation zone 14 are provided with a second gas pump 15, and the top of the hydrogenation zone 14 is connected to a second connecting pipe 6, the other end of the second connecting pipe 6 is connected to a hydrogen machine 3, a reburning zone 21 is provided on one side of the main combustion zone 13, and a nitrogen oxide detector 16 is provided outside the reburning zone 21, a slide 17 is installed between the outside of the nitrogen oxide detector 16 and the inside of the combustion chamber 2, and an electric push rod 19 is installed inside the slide 17, a connecting plate 18 is installed on the top of the electric push rod 19, and an atomizing nozzle 20 is installed outside the connecting plate 18, a lifting structure is formed between the atomizing nozzle 20 and the combustion chamber 2 through the electric push rod 19 and the connecting plate 18, and the outer wall of the connecting plate 18 is in contact with the inner wall of the slide 17, the electric push rod 19 is started, and the electric push rod 19 drives the atomizing nozzle 20 to perform a lifting operation through the cooperation of the connecting plate 18 and the slide 17, so that it is convenient to X Spray reducing agent at locations with higher content;

[0020] The outside of the atomizing nozzle 20 is connected to a first connecting pipe 5, and the other end of the first connecting pipe 5 is installed with a reducing agent tank 4, the other end of the connecting head 10 is connected to an air pipe 9, and the other end of the air pipe 9 is connected to a first air pump 8, and a detachable structure is formed between the air pipe 9 and the preheating zone 12 through the connecting head 10 and the mounting block 11, and the inner wall of the mounting block 11 and the outer wall of the connecting head 10 are in a threaded structure. When the connecting head 10 is manually operated, the connecting head 10 will be rotated and moved outside the mounting block 11, so that the disassembly work of the air pipe 9 and the preheating zone 12 is conveniently completed, and a delivery pipe 7 is connected between the other end of the first air pump 8 and the combustion chamber 2.

[0021] Working principle: When in use, first start the first air pump 8, which leads the tail flue gas of about 170℃ to the preheating zone 12 through the delivery pipe 7 and the air delivery pipe 9. The preheating section requires less O2, and the tail low O2 flue gas is used as the primary air, which not only increases the preheating temperature, but also can burn a small amount of air at low temperature during the volatilization analysis, and control the temperature below 900℃, effectively controlling the thermal NO X The second air pump 15 and the linear motor 24 are started. The linear motor 24 drives the injection head 22 to move through the cooperation of the guide rail 23. The second air pump 15 transports the high-concentration H2 (hydrogen as an energy source generates heat after combustion in the furnace, helps the fuel burn out, and improves energy efficiency) in the hydrogenation zone 14 to the main combustion zone 13 through the hydrogen delivery pipe 25 and the injection head 22. This reduces the proportion of N and O2 in the air. H2 as a combustible energy source can improve combustion efficiency and effectively reduce NO X The reburning zone 21 is filled with H2, which has a strong reducing atmosphere. Due to the low temperature and low O2 content, a large amount of NO will not be generated. X , and can also restore some of the generated NO X , and it is also very helpful for the combustion of fuel and the improvement of thermal efficiency. The NOx detector 16 can detect the generated fuel-type NO X and the small amount of NO generated X X is monitored, and the electric push rod 19 is controlled by the PLC control system (not shown in the attached figure, the nitrogen oxide content data at the emission point is fed back by the PLC through data analysis and calculation to interlock and control the injection amount of the hydrogen generator 3 to achieve an adjustable emission effect). The electric push rod 19 drives the atomizing nozzle 20 to perform a lifting operation through the cooperation of the connecting plate 18 and the slide groove 17, so that it is convenient to adjust the NO X Spray reducing agent at locations with higher content.

[0022] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A hydrogenation catalytic low-nitrogen biomass boiler, characterized in that: include: A fully covered large arc furnace arch (1), wherein a combustion chamber (2) is arranged inside the fully covered large arc furnace arch (1), and a preheating zone (12) is arranged inside the combustion chamber (2), a mounting block (11) is installed on the top of the preheating zone (12), and a connector (10) is connected to the inside of the mounting block (11), a main combustion zone (13) is arranged outside the preheating zone (12), and a hydrogenation zone (14) is arranged on the top of the main combustion zone (13), a guide rail (23) is installed inside the main combustion zone (13), and a linear motor (24) is connected to the inside of the guide rail (23), an injection head (22) is installed at the bottom of the linear motor (24), and a hydrogen delivery pipe (25) is connected to the outside of the injection head (22), and the other end of the hydrogen delivery pipe (25) The end of the main combustion zone (13) is connected to a second air pump (15), the second air pump (15) is arranged inside the hydrogenation zone (14), the top of the hydrogenation zone (14) is connected to a second connecting pipe (6), the other end of the second connecting pipe (6) is connected to a hydrogen generator (3), a reburning zone (21) is arranged on one side of the main combustion zone (13), a nitrogen oxide detector (16) is arranged outside the reburning zone (21), a slide groove (17) is installed outside the nitrogen oxide detector (16), the slide groove (17) is located inside the combustion chamber (2), an electric push rod (19) is installed inside the slide groove (17), a connecting plate (18) is installed on the top of the electric push rod (19), and an atomizing nozzle (20) is installed outside the connecting plate (18); The atomizing nozzle (20) is externally connected to a first connecting pipe (5), and a reducing agent tank (4) is installed at the other end of the first connecting pipe (5); the other end of the connecting head (10) is connected to an air supply pipe (9), and the other end of the air supply pipe (9) is connected to a first air pump (8); a delivery pipe (7) is connected between the other end of the first air pump (8) and the combustion chamber (2); A lifting structure is formed between the atomizing nozzle (20) and the combustion chamber (2) via an electric push rod (19) and a connecting plate (18), and the outer wall of the connecting plate (18) is in contact with the inner wall of the slide groove (17); A moving structure is formed between the injection head (22) and the main combustion zone (13) via a linear motor (24) and a guide rail (23), and the outer wall of the linear motor (24) is in contact with the inner wall of the guide rail (23); The gas delivery pipe (9) and the preheating zone (12) form a detachable structure via a connector (10) and a mounting block (11), and the inner wall of the mounting block (11) and the outer wall of the connector (10) are in a threaded structure.

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